Sash-fastener



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Patented June 21, 1898.

J. T. THOMPSON.

SASH PASTENER.

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Nrrn STATES 1 ATENT rricn.

JOHN T. THOMPSON, OF BALTIMORE, MARYLAND.

. sA -F l rfi w- SPECIFICATION forming part of Letters Patent No.606,101, dated June 21, 1898.

Application filed June 18,1897.

To (IIZZ whom it may concern:

Be it known that 1, JOHN T. THOMPSON, of Baltimore, in the State ofMaryland, have invented certain new and useful Improvements inSash-Fasteners; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to sash-fasteners.

My object is to provide a sash-fastener of simple and cheapconstruction, whereby the sash may be held locked at any desired point,so that the necessity of employing sash guards and weights is obviated,and which will prevent rattling of the sashes.

The invention consists of a sash-fastener comprising certain novelfeatures and combinations of parts appearing more fully hereinafter. 7

In the accompanying drawings, Figure l is a front view, partly insection; Fig. 2, a crosssection showing the upper-sash fastener; Fig. 3,a longitudinal section of the lower-sash fastener and Fig. 4 aperspective View of the fastener shown in Fig. 3.

The window-frame is shown at 1 and the sashes at 2 and 3. Each sash hasa rack A sunk in itsedge, the teeth of which rack point downwardly. Iwill first describe the fastener for the lower sash.

The numeral 5 designates a plate sunk in the window-frame and providedwith an annular toothed portion 6.

The numeral 7 designates a squared spindle which passes through anopening in theaforesaid plate and is adapted to turn therein. At 7 thereis shown a locking-dog which is secured to the inner end of the spindleand is provided with a double-pointed end 8.

The numeral 9 designates a leaf-spring which bears against the dog andis adapted to throw the same outwardly toward the sash. The spindle is'encircled by a coil-spring 10 and provided with a screw-threaded end 11.

The numeral 12 designates the lockin g member, having a squared portion13 adapted to fit and slide on the spindle, and this member is providedwith an annular row of teeth 15, adapted to engage those of the plate 5.This locking member bears against the spring. The upper portion of saidlocking member is Serial No. 641,233, (No model.)

provided with a circular recess 16, and 17 designates a knob screwed onthe spindle and having a cylindrical portion received in the outeropening of the locking member. It will be seen that by turning thelocking member the dogean be retracted, and by causing the teeth of saidmember to engage those on the plate 5and then screwing down the knob,whereby the engagement is made permanent, the dog will be held retractedand the sash can be slid up or down, as desired. As soon as the knob isunscrewed the spring causes the locking member to disengage with theplate. The leaf-spring then throws the dog outward and in engagementwith the rack of the sash, whereby said sash is prevented from dropping.If when the dog is thus in engagement with the teeth of the rack thelocking member be made to engage with the teeth-of the plate 5 and heldthere by the knob, the sash cannot be pushed either up or down.

A similar construction can be employed in connection with the uppersash, Fig. 2, but as the same is not so frequently used as the lowersash itis sometimes preferable to dispense with the plate 5, thecoil-spring, and the locking member and to secure the knob directly tothe spindle. It-will be observed that the upper sash can be operatedfrom the inside only.

Slight changes in construction could be resorted to in carrying out thepresent invention without detracting from any of the advantages of thesame, and I therefore reserve the right to make all such changes as comewithin the spirit and scope of the invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a sash-fastener, the combination with a window-sash, of a rackcountersunk in the edge thereof, and having downwardly-disposed teeth, awindow-frame, a squared spindle extending into the frame, an oscillatorydog secured to the spindle and designed to engage the rack, arectangular locking-plate 5 provided with an enlarged opening for thespindle, an annular toothed projection ex tending from one face of thelocking-plate, a cylindrical locking member, provided with acomparatively large shallow recess in one end and a deep circular recessin its opposite end to operate the dog, and a leaf-spring secured to theface of the frame and having its lower end bent inwardly into engagementwith the dog, substantially as specified.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

defining an intermediate diaphragm, having a squared aperture for thereception of the spindle, teeth upon the locking member engaging theteeth upon the locking-plate proi JOHN T. THOMPSON.

Vitnesses:

A. V. COURTENAY, WM. S. HAMMOND.

